As a key equipment for chromatographic pre-treatment, the analytical tube activator has the core function of achieving deep activation of the chromatographic column through precise temperature control, removing residual impurities in the stationary phase, and improving separation efficiency. Mastering standardized operating procedures is an important prerequisite for ensuring the accuracy of experimental data and extending the lifespan of chromatographic columns. Here is the complete usage process analysis of the device:

1、 Preliminary preparation

Before turning on the device power, it is necessary to complete a basic environmental inspection: confirm that the workbench is stable and free of vibration sources, and that the ventilation system is operating normally to discharge volatile gases. Focus on checking the remaining balance of the carrier gas cylinder to ensure sufficient supply of high-purity nitrogen (or other applicable carrier gas), and adjust the output pressure of the pressure reducing valve to the stable value required by the instrument. Prepare the chromatographic column to be activated synchronously, carefully check whether the column type identification matches the experimental requirements, remove the sealing nuts at both ends of the column, and immediately connect the pipeline interface to avoid prolonged air contact with the packing.

2、 Equipment configuration and parameter setting

Install the chromatography column securely in the slot inside the column temperature chamber, taking care to ensure that the column body is naturally bent to avoid excessive stretching that may cause the stationary phase to detach. After entering the touch interface, set the activation program according to the recommended parameters in the chromatographic column manual: the initial temperature is usually set to room temperature, and the temperature is linearly raised at a certain rate per minute to the highest activation temperature, which needs to be strictly controlled below the tolerance threshold of the stationary phase. Set the insulation duration to allow the fixed phase to fully solidify and form. If it is the first activation of a new column, it is recommended to add a pretreatment stage and slowly replace the air inside the column with carrier gas at a lower flow rate.

3、 Program execution and real-time monitoring

After starting the activation program, closely observe the changes in the system pressure curve. In an ideal state, as the temperature increases, the residual solvent in the column gradually evaporates, and the system pressure should show a gentle downward trend. If abnormal fluctuations occur, the program should be immediately paused to investigate the cause. Common faults include joint leakage or unstable carrier gas flow. The temperature pressure correspondence curve can be recorded in real-time through the supporting software as a reference for optimizing activation conditions in the future.

4、 Cooling and post-processing

After reaching the set insulation time, turn off the heating module and select the natural cooling mode. Be careful not to directly cut off the carrier gas supply. Continue to maintain low flow ventilation until the column temperature drops to near room temperature. This can effectively prevent oxygen infiltration from causing fixed phase oxidation. After the cooling is completed, slowly close the carrier gas valve, seal both ends of the chromatography column with dedicated plugs, mark the activation date and operator information, and store in the designated storage cabinet.

5、 Key points of daily maintenance

Clean the dust inside the column temperature box after each use and regularly replace the intake filter element. Conduct a blank running test once a month to verify the system's sealing and temperature control accuracy. For frequently used chromatography columns, it is recommended to establish an activation cycle file. If the cumulative activation times exceed the manufacturer's recommended value, the old column should be scrapped in a timely manner.

Following the standardized process mentioned above can not only fully leverage the performance advantages of the tube activator, but also significantly reduce the incidence of problems such as chromatographic peak tailing and baseline drift caused by improper operation. Standardized operating habits combined with regular equipment calibration are the technical guarantee for obtaining high-quality chromatographic data.